AlCoCrFeNiVx多主元合金相组织调控和力学性能研究
Study on Phase Structure Control and Mechanical Properties of AlCoCrFeNiVx Multi-Principal Component Alloy
摘要: 针对多主元合金普遍存在的强塑性倒置问题，本文以Al0.7CoCr0.9FeNi2合金为基础体系，设计并制备了一系列V含量的Al0.7CoCr0.9FeNi2Vx (x = 0, 0.5, 0.8, 1)异质双相多主元合金，系统研究了V元素含量对相结构、微观组织特征与室温力学性能的调控规律。研究结果表明，随V含量升高，合金由FCC单相结构逐步转变为FCC + BCC双相结构，同时伴随B2有序相的析出；V元素的引入可实现合金晶格畸变，实现高效固溶强化，同时可精准调控双相的体积分数；均质化处理可有效减轻铸态合金的成分偏析，优化双相组织均匀性，显著改善了合金的强塑性匹配。
Abstract: To address the prevalent strength-ductility trade-off in multi-principal element alloys (MPEAs), this study takes the Al0.7CoCr0.9FeNi2 alloy as the base system. A series of Al0.7CoCr0.9FeNi2Vx (x = 0, 0.5, 0.8, 1) MPEAs with varying V contents were designed and fabricated. The regulatory effects of V content on the phase constitution, microstructural characteristics and room-temperature mechanical properties were systematically investigated. The results demonstrate that with increasing V content, the alloy gradually transforms from single FCC phase to FCC + BCC dual-phase structure, accompanied by the precipitation of ordered B2 phases. The addition of V induces severe lattice distortion, contributing to efficient solid-solution strengthening, and enables precise control over the volume fraction of the dual phases. Homogenization treatment effectively alleviates elemental segregation in as-cast alloys, optimizes the homogeneity of the dual-phase microstructure, and significantly improves the strength-ductility synergy of the alloys.
文章引用：孙辰. AlCoCrFeNiVx多主元合金相组织调控和力学性能研究[J]. 材料科学, 2026, 16(5): 233-245. https://doi.org/10.12677/ms.2026.165117

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